EP0802002A1 - Method for sealedly joining a flanged coupling onto a pipeline - Google Patents

Method for sealedly joining a flanged coupling onto a pipeline Download PDF

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Publication number
EP0802002A1
EP0802002A1 EP97200950A EP97200950A EP0802002A1 EP 0802002 A1 EP0802002 A1 EP 0802002A1 EP 97200950 A EP97200950 A EP 97200950A EP 97200950 A EP97200950 A EP 97200950A EP 0802002 A1 EP0802002 A1 EP 0802002A1
Authority
EP
European Patent Office
Prior art keywords
pipeline
coupling
chamber
pressure
sealedly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP97200950A
Other languages
German (de)
English (en)
French (fr)
Inventor
Adalberto Colombo
Arrigo Vienna
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Snam SpA
Original Assignee
Snam SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Snam SpA filed Critical Snam SpA
Publication of EP0802002A1 publication Critical patent/EP0802002A1/en
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/147—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by radially expanding the inner part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/12—Laying or reclaiming pipes on or under water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/12—Flanged joints specially adapted for particular pipes

Definitions

  • This invention relates to a method which by enabling a flanged coupling and a pipeline to be sealedly connected together in a rapid, economical, comfortable and effective manner, enables damaged pipelines to be quickly repaired even when these are laid at great sea depth.
  • the cycle of operations necessary for repairing a damaged pipeline is known to comprise cutting away the damaged portion, then sealedly joining an external flanged coupling to each of the thus freed ends of the sound pipeline portions, to enable said sound portions of the pipeline to be joined together by a pipe piece sealedly clamped between said flanged couplings.
  • One of said known methods is to make the joint by explosion, ie by plastically expanding the tube and the coupling by explosive charges suitably located within the pipe.
  • Another known method uses a flanged coupling constructed of a material of negative coefficient of expansion, ie a material which contracts with increasing temperature.
  • said coupling is lowered to the temperature of liquid nitrogen, ie about -196° and is then mounted on the pipe, after which the temperature is allowed to return to ambient, by which the coupling contracts, to press and hence adhere as a perfect seal against said pipe.
  • the joint obtained by this method is highly efficient both with regard to pressure, in that the seal extends along the entire length of the coupling, and with regard to axial stresses in that the strong adhesion between the coupling and pipe prevents any axial slippage, however it is immediately evident that such a method is certainly not a practical, rapid or economical way of obtaining a joint, especially when this has to be made at the said sea depth.
  • the pressure which the coupling can exert on the pipe from the outside is limited by instability of the cross-section of the pipe itself, and consequently the adhesion force between the coupling and pipe is also limited.
  • this method also has the drawback of always generating a greater or lesser degree of pipe contraction or shrinkage, this being deleterious in pipelines used for oil or gas in that it could impede the necessary travel therethrough of the well known pigs, ie trolleys equipped for internally cleaning the pipeline or for checking the pipeline mechanical characteristics.
  • a cylindrical coupling with its inner surface shaped with a succession of recesses and toothings is sealedly fixed to a steel pipeline by successive steps involving shaping the inner surface of the coupling with a succession of recesses and toothings and filling each recess in the coupling with two half-rings formed of a material which is practically indeformable or of practically negligible deformation at normal pressure (but collapses with drastic variation in its volume, minus than 70%, at high pressure of the order of 300 kg/cm 2 ) then inserting into the resultant assembly a special hard rubber plug-type expander of annular cross-section mounted idly on a special steel shaft and enclosed between two nylon anti-extrusion rings also mounted idly on said shaft, into a circumferential V-shaped groove between each of the opposing frontal faces of which there being inserted respectively the circumferentially tapered lateral ends of said plug, after which said hard rubber plug is axially compressed by acting on said nylon rings
  • the object of the present invention is precisely to obviate said drawback by providing a method which enables a coupling with a toothed inner surface to be sealedly joined to pipeline in a more effective manner, even at great sea depth, by obtaining a uniform pressure distribution over the pipeline-coupling assembly.
  • the method for sealedly joining a coupling to an underwater pipeline laid at great depth comprising the successive steps of mounting the coupling on the free end of said pipeline and radially expanding said pipeline-coupling assembly to the elastic deformation limit of the coupling material, which is greater than that of the pipeline, is characterised according to the present invention in that said radial expansion of the pipeline-coupling assembly is obtained by creating within the pipeline a sealed chamber in correspondence with the coupling to be joined, and pumping water or another liquid into said chamber to very high pressure.
  • the reference numeral 1 indicates a coupling to be sealedly joined to an underwater pipeline 2 laid at great depth.
  • the coupling 3 which is constructed of a material having a higher elastic deformation limit than the material with which the pipeline 2 is constructed, there is formed a succession of recesses 4 and toothings 5, each recess 4 then being filled with two half-rings 6.
  • the coupling prepared in this manner is then lowered to the deep sea bed and mounted on the end of said underwater pipeline 2.
  • the pipeline-coupling assembly is then expanded radially by means of a suitable device arranged to create a sealed chamber 7 within the pipeline.
  • the pipeline-coupling assembly is expanded to the elastic deformation limit of the material of the coupling 1, so that the pipeline 2 becomes plastically deformed into the recesses 4 of the coupling 1.
  • Said device is finally deactivated and withdrawn so that the elastic return of the coupling creates the desired seal with the underlying pipeline 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Joints With Sleeves (AREA)
  • Gasket Seals (AREA)
EP97200950A 1996-04-18 1997-04-01 Method for sealedly joining a flanged coupling onto a pipeline Ceased EP0802002A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI960742 1996-04-18
IT96MI000742A IT1283611B1 (it) 1996-04-18 1996-04-18 Metodo per la giunzione a tenuta di un manicotto flangiato su di una tubazione

Publications (1)

Publication Number Publication Date
EP0802002A1 true EP0802002A1 (en) 1997-10-22

Family

ID=11374010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97200950A Ceased EP0802002A1 (en) 1996-04-18 1997-04-01 Method for sealedly joining a flanged coupling onto a pipeline

Country Status (8)

Country Link
EP (1) EP0802002A1 (pt)
JP (1) JPH112364A (pt)
KR (1) KR970070692A (pt)
CN (1) CN1085811C (pt)
AU (1) AU714704B2 (pt)
BR (1) BR9701852A (pt)
IT (1) IT1283611B1 (pt)
NO (1) NO971736L (pt)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2224824A1 (es) * 2002-11-28 2005-03-01 Iberfusion, S.L. Metodo para realizar una transicion entre tuberias de acero y polietileno.
WO2015128813A1 (en) 2014-02-25 2015-09-03 Saipem S.P.A. Method and kit for joining a tubular member and a pipeline for conveying corrosive products, and tubular assembly formed using such a method
IT201800010510A1 (it) 2018-11-22 2020-05-22 Saipem Spa Connettore per tubazioni e metodo per collegare il connettore ad una tubazione
CN114413084A (zh) * 2022-01-21 2022-04-29 亿隆自动化不锈钢技术(青岛)有限公司 一种铝管的滚柱胀管及其制备方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3011211B1 (en) * 2013-06-20 2018-05-23 Eaton Corporation Visual indicator for swage fluid coupling
CN109290457A (zh) * 2018-11-19 2019-02-01 江阴市液压油管有限公司 一种液压油管胀管结构和胀管工艺

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2312310A1 (fr) * 1975-05-30 1976-12-24 Comex Procede et dispositifs pour fixer hydrauliquement un embout sur un bout de tube et embouts correspondant
US4501514A (en) * 1980-09-08 1985-02-26 British Underwater Pipeline Engineering Securing of structures to the sea-bed
US4648626A (en) * 1984-08-07 1987-03-10 Nuovo Pignone S.P.A. Telescopic joint for repairing underwater pipelines laid at a great depth
EP0338164A1 (en) * 1988-04-22 1989-10-25 Cooper Industries, Inc. Subsea tubular joint

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1174062B (it) * 1984-03-14 1987-07-01 Nuovo Pignone Spa Perfezionamenti nel metodo per la giunzione a tenuta di un manicotto ad una tubazione sottomarina posata a grande prfondita

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2312310A1 (fr) * 1975-05-30 1976-12-24 Comex Procede et dispositifs pour fixer hydrauliquement un embout sur un bout de tube et embouts correspondant
US4501514A (en) * 1980-09-08 1985-02-26 British Underwater Pipeline Engineering Securing of structures to the sea-bed
US4648626A (en) * 1984-08-07 1987-03-10 Nuovo Pignone S.P.A. Telescopic joint for repairing underwater pipelines laid at a great depth
EP0338164A1 (en) * 1988-04-22 1989-10-25 Cooper Industries, Inc. Subsea tubular joint

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2224824A1 (es) * 2002-11-28 2005-03-01 Iberfusion, S.L. Metodo para realizar una transicion entre tuberias de acero y polietileno.
WO2015128813A1 (en) 2014-02-25 2015-09-03 Saipem S.P.A. Method and kit for joining a tubular member and a pipeline for conveying corrosive products, and tubular assembly formed using such a method
US10286440B2 (en) 2014-02-25 2019-05-14 Saipem S.P.A. Method and kit for joining a tubular member and a pipeline for conveying corrosive products
IT201800010510A1 (it) 2018-11-22 2020-05-22 Saipem Spa Connettore per tubazioni e metodo per collegare il connettore ad una tubazione
CN114413084A (zh) * 2022-01-21 2022-04-29 亿隆自动化不锈钢技术(青岛)有限公司 一种铝管的滚柱胀管及其制备方法

Also Published As

Publication number Publication date
BR9701852A (pt) 1998-09-29
CN1167882A (zh) 1997-12-17
JPH112364A (ja) 1999-01-06
ITMI960742A0 (pt) 1996-04-18
NO971736D0 (no) 1997-04-16
KR970070692A (ko) 1997-11-07
ITMI960742A1 (it) 1997-10-18
AU1771997A (en) 1997-10-23
IT1283611B1 (it) 1998-04-22
CN1085811C (zh) 2002-05-29
NO971736L (no) 1997-10-20
AU714704B2 (en) 2000-01-06

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